New paper: Z_N Berry phase and symmetry protected topological phases of SU(N)...

Yuichi Motoyama, Synge Todo,
Z_N Berry phase and symmetry protected topological phases of SU(N) antiferromagnetic Heisenberg chain,
Phys. Rev. B 98, 195127 (6pp) (2018). (preprint: arXiv:1508.00960)